Corncob residues as carbon quantum dots sources and their application in detection of metal ions

Zhang, Liguo; Wang, Yu; Liu, Wei; Ni, Yonghao; Hou, Qingxi

doi:10.1016/j.indcrop.2019.03.019

Cited by 58 publications

(27 citation statements)

References 29 publications

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“…At present, more and more researchers have applied the synthesized biomass carbon dots to the detection of metal ions. The carbon dots prepared using poplar leaves, [ 169 ] lemon juice, [ 6 ] pear juice, [ 170 ] corncob, [ 171 ] and alkali lignin [ 139 ] as carbon sources could be used to detect iron ions. As more and more reports on the detection of iron ions by biomass carbon dots, researchers were also constantly striving to achieve continuous breakthroughs of the lowest of detection (LOD).…”

Section: Application Of Biomass Carbon Dots In Sensingmentioning

confidence: 99%

Recent advances of biomass carbon dots on syntheses, characterization, luminescence mechanism, and sensing applications

et al. 2021

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Carbon dots have attracted much attention due to their high fluorescence intensity, easy modification, good stability, and biocompatibility. However, the realization of low‐cost mass production of high‐quality carbon dots still faces great challenges. Biomass is of non‐toxic and environmentally friendly organism, but a lot of biomass is treated as waste for burning and landfill at present, causing irreparable pollution to the environment. In fact, many biomass resources are ideal candidates for preparing carbon dots. This review focuses on carbon dots including carbon quantum dots (CQDs) and graphene quantum dots (GQDs) which using biomass as carbon source on the aspects of plants and their derivatives, animals and their derivatives and municipal waste. The characterization of the structure and composition of biomass carbon dots, the regulation of fluorescence color and the methods of improving quantum yield (QY) including heteroatom doping and surface modification are introduced in detail. Moreover, biomass carbon dots for detecting metal ions and non‐metal molecules and their quenching mechanism are emphatically introduced in addition to summarizing the luminescence mechanism, and some promising prospects and challenges in this uplifting field are discussed.

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Section: Application Of Biomass Carbon Dots In Sensingmentioning

confidence: 99%

Recent advances of biomass carbon dots on syntheses, characterization, luminescence mechanism, and sensing applications

et al. 2021

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“…Therefore, about 3.5 × 10 7 -3.9 × 10 7 t corncob could be obtained every year from the corn production. [4] Due to its richness in pentosans, corncob has been widely employed as a high-class quality and one of the most abundant feedstocks for xylitol production. [5] The process involves a simple separation of hemicellulose from corncob by hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

“…This would inevitably lead to environmental issues and be harmful to the sustainable development. Currently, CR has been explored to produce hydrochar, carbon quantum, ethanol, biosorbent, and porous carbon in the literature [4,[7][8][9][10]. However, these CR derived products are far from industrial applications due to their poor performance and high cost of production.…”

Section: Introductionmentioning

confidence: 99%

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

et al. 2020

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In this study, corncob residue (CR) valorization was simply and efficiently realized via carboxymethylation, and its enhanced performance as fillers in urea-formaldehyde (UF) resin was investigated. The structures of corncob residue and carboxymethylated derivative were analyzed by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), and Raman techniques, respectively. The thermal stability, morphology, viscosity control, and adhesive strength were then investigated to evaluate its performance as fillers in UF resin composite. Similar to commercial flour, carboxymethylated CR could effectively disperse in UF resin. It also exhibited a better initial viscosity control between 30 and 50 °C. The adhesive test analysis showed that the shear strength of resin with carboxymethylated CR addition could reach 1.04 MPa, which was comparable to flour (0.99 MPa) and significantly higher than raw CR (0.45 MPa). Moreover, a low formaldehyde emission was observed.

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“…After matching, when the concentration of Fe 3+ was in the range of 0.1–10 μmol L −1 , the fluorescence ratio of G‐CDs had a linear relationship, and the linear correlation coefficient was 0.9996, indicating that the system had an excellent recognition ability to Fe 3+ . According to the limit of detection (LOD) formula LOD=3 σ / K , the LOD was 0.08 μmol L −1 , which is lower than the value previously literatures reported [28–37] . In addition, the limit of detection of Fe 3+ was lower than the guideline limit proposed by the WHO (5.36 μmol L −1 ) [38] …”

Section: Resultsmentioning

confidence: 63%

“…According to the limit of detection (LOD) formula LOD = 3σ/K, the LOD was 0.08 μmol L À 1 , which is lower than the value previously literatures reported. [28][29][30][31][32][33][34][35][36][37] In addition, the limit of detection of Fe 3 + was lower than the guideline limit proposed by the WHO (5.36 μmol L À 1 ). [38] 2.5.…”

Section: Construction Of Fe 3 + Probementioning

confidence: 69%

Facile Synthesis of Green Fluorescent Carbon Dots and Application for Iron (III) Detection, Patterning and Cell Imaging

Hou

Zhang

et al. 2021

ChemistrySelect

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Carbon dots (CDs) as a novel type of nanomaterials have attracted significant attention in various scientific communities because of their excellent fluorescence. Herein, green fluorescent CDs (G-CDs) were obtained using one-pot hydrothermal treatment of Lonicera maackii fruit and exhibited excellent fluorescence characteristic and good bio-compatibility. The assynthesized G-CDs displayed strong green fluorescence, which was specifically quenched by Fe 3 + . And we develop a method for excellent sensitive and selective detection of Fe 3 + with a linear range of 0.1-10 μM and a limit of detection of 0.08 μM. The method was further extended to measure the concentration of Fe 3 + in actual water samples which the result is satisfactory. The synthesized G-CDs were applied for drawing fluorescent patterns, which may be used for anti-counterfeit. Finally, the prepared G-CDs were used in cell imaging and detection of Fe 3 + in live cells.

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Corncob residues as carbon quantum dots sources and their application in detection of metal ions

Cited by 58 publications

References 29 publications

Recent advances of biomass carbon dots on syntheses, characterization, luminescence mechanism, and sensing applications

Recent advances of biomass carbon dots on syntheses, characterization, luminescence mechanism, and sensing applications

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

Facile Synthesis of Green Fluorescent Carbon Dots and Application for Iron (III) Detection, Patterning and Cell Imaging

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